An image of Lee David Clayworth posted to LiarsCheatersRUs.com. The Canadian teacher says an ex-girlfriend from Malaysia is trying to ruin his reputation though online postings. Picture: LiarsCheatersRUs.com Source: Supplied

A CANADIAN teacher says his ex girlfriend has waged a vicious online hate campaign against him, posting allegations he's a psychopath and child molester.

Lee Ching Yan, 29, cyberstalked Lee David Clayworth, 35, for almost two-and-a-half years after the end of their brief relationship.

Mr Clayworth believes his ex is now living in Australia.

The two met while Mr Clayworth was teaching at an international school in Malaysia in 2010. After dating casually for several months, they broke up in December 2010.

Mr Clayworth told the Today show in the US that after the break-up Yan broke into his home, took his laptop, hard drive and other personal information.

"I did a Google search of my name and I saw profiles listed saying … I am a psychopath, I am a child molester, a paedophile, I am involved with my students and so on - and then that just steamrolled," he said.

Court documents show Yan retrieved nude photos of Mr Clayworth from his computer and posted them on several sites.

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